After Paul Bäumer was injured in a crash in early 1918 he served at Idflieg. He went back for a short period in Sept - Oct. 1918 then went back to Idflieg. Its highly possible he had a Fokker D.VII available to him. During this time he tallied victories #23-43.
". . .Ltn. Paul Bäumer returned to Jasta B on 4 September 1918 and returned to operations. Jasta B was solely equipped with the Fokker D.VII to the end of the war. There is a photo of Ltn. Bäumer standing along side of a Fok.D.VII with a black band with white edging with a relative and his dog, on page 112 of Jagdstaffel 2 "Boelcke". There is a photo of Vzfw. Paul Bäumer getting ready for a flight in Alb.D.V 4430/17 with an identical black band edged in white. page 78 of the same book. So I feel quite confidant that the aforementioned Fok.D.VII is his machine. It would have had the white nose and black and white empennege.
Blue skies,
Dan-San"